/Engine/Plugins/Online/OnlineSubsystem/Source/Public/OnlineSubsystem.h
Create an instance of the platform subsystem
newly created and initialized online subsystem, NULL if failure
[IOnlineSubsystemPtr](API\Plugins\OnlineSubsystem\IOnlineSubsystemPtr) CreateSubsystem ( [FName](API\Runtime\Core\UObject\FName) InstanceName )